Cluster Ellipticals at High Redshift: The View from the Ground and with HST

Details Cluster Ellipticals at High Redshift: The View from the Ground and with HST Cluster Ellipticals at High Redshift: The View from the Ground and with HST

1995-07-16

arxiv.org/abs/astro-ph/9507064v1

Astronomy and Astrophysics

Astrophysics

10 page postscript file including 6 figures, uuencoded, gzip-compressed, self-unpacking, and so forth. To appear in "Fresh Vie

Scientific paper

New ground-based and HST observations of distant clusters make it possible to trace the history of E/S0 galaxies to lookback times of ~10 $h_{50}^{-1}$ Gyr. The data strongly favor a scenario in which cluster ellipticals formed very early with a narrow spread in ages. By z = 1.2 there are changes in color and luminosity consistent with simple passive evolution, but even at that redshift the galaxies appear mature, with red colors suggesting ages of several Gyr. Apparently we are still falling well short of seeing the true epoch of formation.

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